CVE-2023-21674
Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation)
Published 10 Jan 2023 · updated 17 Jun 2026 · Analyzed
8.8 High · CVSS 3.1, microsoft.com
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 10 Jan 2023, with a remediation deadline of 31 Jan 2023 for US federal agencies.
Required action: Apply updates per vendor instructions.
Description
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21674 · Patch, Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21674 · US Government Resource